I dunno, personally I started reading X-men at 7 years old because of how badass Wolverine is
it don't make my parents bad parents

never once did I get the urge to go out and start stabbing ninjas
lol

It can be suitable for kids and still be suitably badass for us longtime fans

It depends on the kid. I know when I showed the first X-men film to my little brother (he was around 6 or 7 at the time) it actually scared him a bit. And I remember when I was 7 I was in love with Jurassic Park. So kids definitely have a different thresh hold for fantasy violence. I could see how that scene in X2 could freak some kids out.

However, I was a few days away from 14 when X2 came out and I remember having a huge nerdgasm when Wolverine finally went Beserk. It's the closest we've seen to him really letting lose in the films so far.